Implementation Of A Magnetic Resonance Imaging Computer Simulator And Preliminary Results

Brent K. Stewart

doi:10.1117/12.975394

12 June 1986 Implementation Of A Magnetic Resonance Imaging Computer Simulator And Preliminary Results

Brent K. Stewart

Proceedings Volume 0626, Application of Optical Instrumentation in Medicine XIV and Picture Archiving and Communication Systems; (1986) https://doi.org/10.1117/12.975394
Event: Application of Optical Instrumentation in Medicine XIV and Picture Archiving and Communication Systems (PACS IV) for Medical Applications, 1986, Newport Beach, CA, United States

Abstract

This paper presents a computer simulation applicable to any magnetic resonance imaging method. The simulation solves the phenomenological Bloch equation numerically for time-dependent gradient fields, applying pulse rotation and time-evolution matrix operators in the rotating frame to each element of a digital phantom. Application of these operators yields. the global magnetization, calculated for each sampling time to produce the discrete Free Induction Decay (FID). A collection of these FIDs are then inverse Fast Fourier Transformed into the desired spatial image for display on a video monitor using an image processor. Since the simulation utilizes a general matrix operator approach to pulse app-lication and FID sampling, it may be used to simulate any MR imaging method employing var-ious pulsing sequences, gradient profiles and sampling intervals. This model is used to emulate a 2DFT phase-encoded spin-echo sequence and also very fast MR imaging using small angle excitation. A discussion of the computational problems involved and the simulations efficacy are included.

Citation Download Citation

Brent K. Stewart "Implementation Of A Magnetic Resonance Imaging Computer Simulator And Preliminary Results", Proc. SPIE 0626, Application of Optical Instrumentation in Medicine XIV and Picture Archiving and Communication Systems, (12 June 1986); https://doi.org/10.1117/12.975394

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